Door lock mechanism



Nov. 30, 1965 w. B. WILSON 3,220,231

DOOR LOCK MECHANISM Filed Dec. 5, 1962 4 Sheets-Sheet l r l I v Nov. 30,1965 w. B. WILSON 3,220,231

DOOR LOCK MECHANI SM Filed Dec. 5, 1962 4 Sheets-Sheet 2 f} w M07 77635.

W. B. WILSON DOOR LOCK MECHANISM 7 Nov. 30, 1965 4 Sheets-Sheet 5 FiledDec. 5, 1962 Ila @1710?- Malia/775 11/115017.

Nov. 30, 1965 w. B. WILSON 3,220,231

DOOR LOCK MECHANISM Filed Dec. 5, 1962 4 Sheets-Sheet 4 In fan for.Mlliamfi M15 011' Ii 0. 1,1111 -W// a.

MN WNWNNI m lllllllllll llllllll United States Patent 3,220,231 DOORLOCK MECHANISM William B. Wilson, La Habra, Calif., assignor to NationalLock (30., Rockford, Ill., a corporation of Delaware Filed Dec. 5, 1962,Ser. No. 242,537 12 Qlaims. (Q1. 70-146) The present invention relatesto a novel builders lock construction or lock set comprehending threebasic unit assemblies including a latch bolt, an outer knob and tubeassembly and an inner knob and tube assembly all capable of beingcombined into plural types of lock sets including a passage door lockfor entrance from one room to another by mere turning of the knob, aprivacy lock such as employed on the door of a bathroom, bedroom orother room or enclosure having locking means capable of being locked bymeans of a push button on the inner knob by a person upon entering theroom and desiring privacy, and in a privacy lock embodying the pushbuttonactuated locking means but with the outer knob and its tubeprovided with a key-operated lock permitting entry from the exterior byuse of a proper key.

In each form of passage door and privacy locks, the novel lock setrequires no housing and is readily and easily adjusted to doors varyingsubstantially in thickness. In each the latch bolt assembly is apreassembled unit adapted for use in each type of lock set disclosed,and the other basic assemblies including the outer knob and its afiixedplural tube assembly and the inner knob and its tube assembly aredesigned and constructed to provide a privacy lock having novel lockingmechanism actuated by a push button on the inner knob.

It is an important object of the present invention to provide a novelbuilders lock or lock set comprising three basic assemblies including alatch bolt unit, an outer knob having an affixed outer tube and a centertube having a roll-back, and an inner knob and tube, these novelassemblies being so designed and constructed that when combined theyprovide a passage door lock set for freely retracting the latch bolt byturning of either knob, and also designed to receive novel locking meansfor locking the latch bolt by depressing a push button on the inner knoband released by turning this inner knob to retract the latch bolt, andin which the outer knob may be provided with a key lock for retractingthe locked latch bolt.

The present invention comprehends a novel lock construction in which itsbasic components are readily assembled for use either as a passage doorlock in which the latch bolt is freely retracted by turning of eitherthe outer or inner knob, or when combined with the novel locking meansproviding a privacy lock in which locking is controlled by a push buttonon the inner knob and the outer knob is locked against turning movementuntil the push button is released by the occupant turning the innerknob, or converted to a privacy lock with a push button controlled innerknob and the outer knob key-operated for permitting entry from theexterior by retracting the latch bolt.

A further object of the present invention is the provision of a novellocking mechanism for a basic lock set assembly including an inner knoband tube, an outer knob and tube, and a center tube all so constructed,arranged and combined as to receive and mount the novel lockingmechanism for providing a privacy lock set actuated by a push button inthe inner knob and with or without a key-operated lock in the outerknob.

Another object of the present invention is the provision of a novelspindle assembly for a door lock comprising an inner tube afiixed to aninner knob, an outer tube aflixed to an outer knob, and a center tubecarrying a roll-back for retracting a latch bolt, said tubes beingstandardized for use in lock sets of the passage door, privacy andkey-lock types.

The present invention further comprehends the provision in a builderslock or lock set of a novel push button-actuated locking means forcontrolling operation of the latch bolt.

Further objects are to provide a construction of maximum simplicity,efliciency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby.

In the drawings:

FIGURE 1 is a top plan view showing the novel door lock and latchmechanism combined in assembled relation but removed from the door inwhich it is mounted.

FIG. 2 is a top plan view of the outer knob and tube assembly includingthe outer and center tubes combined but with the position of the partsreversed from that of FIG. 1 Where the outer knob is shown at the leftand with a portion of the knob broken away to show the outer sleeve.

FIG. 3 is a top plan View of the inner knob and its tube and escutcheonand clamp plate assembly, the position being the reverse of the showingin FIG. 1 where the inner knob is shown at the right.

FIG. 4 is a view in end elevation of the inner end of the inner tubeassembly of FIG. 3.

FIG. 5 is a view in front elevation of the assembled outside and centertube of the spindle assembly in the position occupied in FIG. 1.

FIG. 6 is a view in end elevation taken from the inner or right-hand endof FIG. 5.

FIG. 7 is a view rear elevation of the tube assembly of FIG. 5.

FIG. 8 is a view in vertical cross section taken on the line 8-8 of FIG.5 and viewed in the direction of the arrows.

FIG. 9 is a view in vertical cross section taken on the line 9-9 of FIG.5 and viewed in the direction of the arrows.

FIG. 10 is a view in vertical cross section taken on the line 1010 ofFIG. 7 and viewed in the direction of the arrows.

FIG. 11 is a view in side elevation of the locking bar assembly for thepush button-actuated lock, including the locking bar, locking clip,spring cup and the cup spring.

FIG. 12 is a view in end elevation taken from the inner or right-handend of FIG. 11.

FIG. 13 is a top plan view of a sub-assembly, including the outer tubeadapted to project into the outer knob, the

center tube, the locking bar, spring cup and the cup spring, push buttonclip to which is afliXed the push button, and the outer clamp plate andstuds mounted on the outer tube.

FIG. 14 is a view in end elevation taken from the inner or right-handend of FIG. 13 but with the push button clip removed.

FIG. 15 is an enlarged view in perspective of the clip for mounting thepush button on the inner end of the locking bar.

FIG. 16 is a longitudinal view in horizontal cross section through theassembled lock set but omitting the latch bolt, and showing in plan thelock mechanism including the push button-actuated locking bar assembly,the outer knob and outer tube designed to receive a key lock.

FIG. 17 is a view in vertical cross section taken on the line 17-17 ofFIG. 1.

FIGS. 18 to 33, inclusive, disclose the disassembled component parts ofthe lock mechanism, in which FIG. 18 is a cross-sectional view of theouter knob having an opening for the reception of a key lock cylinderand plug ring; FIG. 19 is a view in side elevation of the lock cylinderand plug ring; FIG. is a cross-sectional view of the outer escutcheon;FIG. 21 is a cross-sectional view of the outside clamp plate; FIG. 22 isa side elevational view of a round stud; FIG. 23 is a side elevationalview of a square stud received in the tail piece of the housing for thelatch bolt; FIG. 24 is a rear elevational view of the outer tube; FIG.is a top plan view of the center tube; FIG. 26 is a side elevationalview of the inner tube; FIG. 27 is a cross-sectional view of the innerclamping plate; FIG. 28 is a cross-sectional view of the innerescutcheon; FIG. 29 is an elevational view of one of the two attachingscrews; FIG. is a cross-sectional view of the inner knob having anopening for the reception of the push button; FIG. 31 is a disassembledview of a washer, coil spring and spring cup mounted in the center tube;FIG. 32 is a top plan view of the locking bar; and FIG. 33 is adisassembled view of the coil spring, spring cup, locking clip, buttonclip and push button all assembled on the inner end of the locking bar.

FIG. 34 is a front elevational view of the inner tube.

FIG. is a rear elevational view of the inner tube.

Referring to the disclosure in the drawings, the basic assembly includesa preassembled latch bolt unit including a latch bolt 10 (FIGS. 1 and17) mounted on the outer reduced end 11 of a bolt retractor 12 havingspaced legs 13 and 14 provided with parallel portions received within atubular housing 15 conformably received and mounted within a bored hole.The housing may be of the mortise or non-mortise type, although in theillustrative embodiment in the drawings is shown a mortise type housinghaving a face plate 16 anchored in an edge of the door by means ofscrews or other attaching means 17.

The housing 15 is provided at its inner end with a tail piece 18 forminga closure for the inner end of the housing and to which the tail pieceis securely anchored, and a projection 19 having a square or polygonalopening 21 contormably receiving a square stud 22. This tail piece hasdiametrically opposed slots through which project rearwardly the spacedlegs of the sections 13 and 14 of the bolt retractor 12. Beyond the tailpiece the legs or sections 13 and 14 are bent outwardly and rearwardlyto provide enlargements or expanded portions at 23 and 24, respectively,and are then turned inwardly to provide relatively wide shoulders at 25and 26 contacted by the widely spaced edges or flanges 27 providing acamming means 28 such as a rollback or portion of increased area ordiameter on a center tube hereinafter referred to for retracting thebolt retractor 12 to withdraw the latching bolt 10.

The legs or sections 13 and 14 are extended rearwardly beyond theshoulders 25 with the section 13 bent or formed to provide alongitudinally extending end 29 and the section 14 with a longitudinallyextending portion 30, a bridging portion 31 and a return portion 32extending forwardly and over the end 29 of the section 13. The boltretractor 12 being of spring metal, the inwardly extending enlargementsor flared portions 23 and 24 are adapted to be compressed sufficientlyto project them through a bored hole in the edge of the door forassembly or disassembly, and when projected through the hole intooperative position automatically expand to the position shown, theextent of expansion being limited by contact between the overlappingends 29 and 32. An expansion spring 33 spring-biases the latch bolt intoprojected position and latching engagement.

The arrangement of the extended shoulders or portions 25 and 26 withwhich either edge 27 of the rollback 28 contacts, provides for a throwof the latch bolt which is substantially greater than that accomplishedby prior assemblies.

The basic outer knob assembly consists of an outer knob 34, an outertube 35, a mating and concentric intermediate or center tube 36, anouter escutcheon 37, an outer clamp plate 38 having an internallythreaded round stud 39 and the internally threaded square stud 22 havingtheir plain heads mounted. in openings in the clamp plate 4 38. A notchor slot 40 (see FIG. 16) is cut in the outer clamp plate 38 for apurpose to be later described.

The basic inner knob assembly consists of a knob 41, an inner escutcheon42, an inner clamp plate 43, and an inner tube 44 (FIGS. 26, 34 and 35).Attaching screws 45 are provided in the inner clamp plate 43 andreceived in the internally threaded studs 39 and 22. The innerescutcheon 42 is shown provided with openings 46 for access to thescrews 45.

The outer tube 35 and the mating intermediate or center tube 36 areattached or staked together for simultaneous rotation with the outerknob 34 when the assembly is intended for a passage door lock, the innertube 44 being also affixed to the tube 36 whereby rotation of eitherknob rotates the intermediate or center tube 36 and its roll-back 28 toretract the latch bolt 10.

The outer tube 35 is provided with longitudinally extending spaced slots47 and an adjacent transverse slot 48 (FIG. 5), and approximately 180from the longitudinal portion 49 defined by the slots 47, the tube isprovided with a continuous longitudinal slot 51 (FIG. 7). Adjacent theinner end of the slot 51 and at each side thereof, the outer tube istransversely slotted to provide embossments 52. and outwardly from theseembossments along the slot 51 this tube 35 is provided with spaced slots53 to provide intermediate projections 54 for preventing the assembledinner center tube 36 from being withdrawn from the outer tube 35. Theouter knob 34 is indented at 55 with the indentation conformablyreceived in the longitudinal slot 51 whereby the outer knob is slidablymounted longitudinally of its tube 35.

When the assembly functions as a passage door lock, the portion 49intermediate the longitudinal slots 47 is indented into an elongated,longitudinally extending indentation 56 between the edges 27 of therollback 28,. whereby the center tube 36 and the outer tube 35 arelocked against relative movement or rotation.

The center tube 36 is provided at its outer end with a cylindrical part57 and adjacent thereto and forwardly thereof with a circumferentialslot 58 between the part 57 and arcuate projections 59 having alongitudinal slot 61. At the inner end of the center tube 36 forwardlyof the rollback 28, the tube 36 is provided with a cylindrical part 62longitudinally slotted at 63 in alignment with.

the slot 61 and cut-away at 64 to provide a shouldered portion.

When the tube assembly including the outer tube 35 and the center tube36 are assembled for the reception. of a push button locking means, theportion 49 of the.

outer tube 35 between the spaced longitudinal slots 47 is not indentedwhereby to permit relative movement between the outer tube 35- and thecenter tube 36.

' When the basic assembly is employed in a privacy lock III which theinner knob 41 is provided with a push. button assembly, there isinserted in the intermediate:

tube a washer 65, a coil or expansible spring 66 and an end cap or cupwasher 67 having a central aperture 67*,

with one end of the spring abutting the washer 65 and the other endreceived in the cup washer 67. An elongated locking bar or arm 68 has anouter or forward reduced projection 69 received in the aperture of thecup washer, and spaced lateral projections 71 and 72, the projection 71received and longitudinally movable within the end of the longitudinalslot 51. inthe outer tube 35 and a corresponding slot 61 in the centertube, and the projection 72 received and longitudinally movable withinthe longitudinal slot 63 in the mating tube 36. The extended or innerend portion 74 on the locking bar 68 is provided with a coil orexpansible spring 75 hearing at one end against the lateral projection72 and at its other end received within an apertured cup washer 76, theaperture permitting the extended end portion 74 of the locking bar toproject therethrough. A U-shaped locking clip or latch 77 is freelypivoted on the locking bar 68 by means of a pin 78, with the innerinclined end 79 of the locking clip being adapted to drop and engage oneof a pair of spaced stops 31 and 82 in the bottom of the center ormating tube 36, whereby when the locking bar is projected inwardly theclip 77 is elevated as it rides over the inclined stop 81 whereupon theend 79 of this clip drops and engages the forward end of this stop andretains the locking bar 68 in its locking position. When the locking baris released upon turning of the inner knob, the inner tube 44 and thislocking bar rotate sufficiently to release the locking clip 77 from thestop 81 and the locking bar 68 is spring-biased to its outer inoperativeposition against the stop 82.

The inner end 74 of the locking bar 68 is provided with multiple spacednotches 83 each being adapted to receive inturned bifurcations orprojections 84 and an extension 84 on the free end of an adjustingspring clip 85 (FIGS. and 33) which projections straddle the locking bar68 and the extension is conformab-ly received in a notch 83. Theopposite side 86 of this spring clip is provided with an inturned tongue87 at each side straddling the sides of the locking bar 68 to securelyanchor the clip to the locking bar. The opposite or closed end 88 ofthis spring clip projects into and is aflixed to the interior of a pushbutton 89 for depressing the locking bar 68 by a person entering anddesiring privacy in the room. The spring clip 85 may engage any one ofthe notches 83 for adjustment on the locking bar 63.

When the button 89 and the locking bar 68 are in their normal positionas shown in FIG. 16, the projection 72 is located in the slot 63 of thecenter tube 36 to prevent relative rotation therebetween, and theprojection 71 is positioned in the slot 61 of the center tube and thealigned slot 51 in the outer tube so that the outer and center tubesrotate together. When the button 89 is depressed and the locking bar 68moves to the left as viewed in FIG. 16, projection 72 is shifted out ofthe slot 63 and the projection 71 remains in the slot 51 in the outertube 35, but enters the slot formed in the stationary clamp plate 38 andthe circumferential slot 58 in the center tube 35.

The loclcing clip or latch 77 is also shifted so that the inner end 79rides over the inclined stop 81 and drops and engages the forward end ofthis stop to retain the bar 68 in the locking position. In this lockingposition, the outer knob 34 and outer tube 35 cannot rotate due to theinterengagement of the projection 71 with the slot 51 of the tube 35 andthe slot 40 of the fixed clamp plate. However, the inner tube 44 andcenter tube 36 are connected together by the portion of the inner tube44 between the slots 99 indented into the slot 63 of the center tube aslater described, and the inner knob 41, inner tube 44 and center tube 36can rotate simultaneously relative to the locking bar 68 and the outertube 35 as the projection 71 of the locking bar is located in thecircumferential slot 58 in the center tube.

Thus, the outer knob 34 is prevented from being rotated to release thepush button 89, but all the occupant of the room is required to do torelease the push button and its locking bar 68 is to turn the inner knob41. Rotation of this knob causes rotation of the center tube 36 relativeto the locking bar 68 to a sutiicient extent that the stop 81 is movedout of the path of the inner end 79 of the latch 77, and the spring 66urges the locking bar 68 to the right until the projection "72 abuts theedge 64* of the center tube 36 with the latch 77 moved sufliciently toavoid reengaging the stop 81. Rotation in the reverse direction alignsthe slot 63 with the projection 72 to allow movement of the locking bar68 to its normal position, as shown in FIG. 16, with the inner end 79 ofthe latch 77 engaging the stop 82 in the center tube 36.

When the above described privacy lock is intended for use in an exteriordoor or for an enclosure accessible from the outside of the door bymeans of key-operated lock in the outer door knob 34, all that isrequired is to install in an opening 91 in the outer knob a standard orconventional key-operated lock plug and cylinder 92 and plug ring 93which is inserted into the outer tube 35 with its lateral projection 94slidably received in the longitudinal slot 51 in this tube.

To unlock from the outside, the door previously locked by depressing thepush button 89 at the interior, requires insertion and turning of theproper key in the cylinder lock 92. This rotates the plug ring 93 havingits projected end received in the slotted outer end of the center tube36 and carries therewith the center tube which rotates within the outertube 35. This causes its rollback 28 in turning to retract the latchbolt 16. It should be noted that in the locked position as mentionedabove and in which the clip or latch 77 engages behind the stop 81, thelocking bar 68 is projected outwardly or forwardly whereby itsprojection 72 leaves the slot 63 in the center tube 36 permitting thecenter tube to be rotated relative to the locking bar 68. Rotation ofthe center tube will release the clip or latch .77 on the bar 68 fromthe stop 81 in the center tube and the projection 72 abuts the edge 64of the center tube 36. When the key is turned back to release it fromthe lock, the center tube 36 is returned to normal position with theslot 63 aligned with the projection 72. As the clip 77 has been releasedfrom the stop 81, the locking bar 68 is spring-biased to its unlocked orinoperative position with the projection 72 entering the slot 63 and theclip 77 abutting stop 82.

As shown in FIGS. 26, 34 and 35, the inner tube 44 is provided with anelongated longitudinal slot 95, and closely spaced transverse notches 96opening in the slot to provide tongues 97 adapted to be indented intothe inner end of the elongated indentation 56 in the center tube 36 toprevent the assembled inner tube from being withdrawn from the assembly.The inner tube 44 is also provided with a transverse slot 98 andlongitudinal slots 99 on the side opposite the longitudinal slot 95. Theportion of the tube 44 between the slots 99 is adapted to be indentedinto the longitudinal slot 63 of the center tube 36 to lock the innertube 44 and the center tube 36 against relative rotation. Stops orabutments 52 like those on the outer tube 35 are also provided.

The transverse slot 98 like the slot 48 in the outer tube 35 is adaptedto conformably receive an outer projection 101 on an expanding ring 102positioned within each tube 35 and 44-, one such ring being shown in theouter tube 35 in FIG. 16. The neck of each knob 34 and 41 is providedwith a similar transverse slot whereby when a knob is assembled on itstube and its slot is aligned with a slot in its tube through whichextends the depressed projection 101, this spring-biased projection enters the slot in the knob and locks the knob to its tube. The inner knob41 is also provided with an indentation 55 like that of the outer knob34- received in the longitudinal slot 95 of the inner tube 44 foraligning the knob and retaining it against rotation on its tube.

The embossments 52 provide stops or abutments for locating the outer andinner tubes 35 and 41 relative to the outer and inner clamp plates 38and 43, respectively.

When the novel basic assembly is employed as a passage door lock, theinner and outer knobs may be devoid of an opening for it requires nosupplemental locking means for the latch bolt, although an inner orouter knob having an opening may be used and the opening provided with asuitable cap 193 as shown in FIG. 16 to provide a closure.

In the combining of the basic assemblies of the lock set in openings inthe door, the latch bolt unit is inserted in a conforming opening in theedge of the door. Next the outer knob assembly (FIG. 2) with its outertube and affixed center tube is inserted with the square stud 22projecting through the square opening 21 in the tail piece 19 of thelatch bolt. Then the inner knob assembly is mounted in position with theattaching screws 45 inserted from the interior of the inner clamp plateand threaded into the studs 22 and 39. Thus when these screws aretightened the inner and outer clamping plates are drawn tightly againstthe door to provide a rigid assembly which requires no encompassinghousing.

Having thus disclosed my invention, 1 clam:

1. A lock construction for a door or other closure, comprising a latchbolt assembly having a housing provided with a tail piece having apolygonal opening and a rearwardly projecting bolt retractor, an outerknob unit including an outer knob, an outer tube on which the knob ismounted, a clamp plate and escutcheon mounted on said tube with saidclamp plate provided with rearwardly projected attaching studs one ofwhich is of polygonal cross section conformably received and projectedthrough the polygonal opening of said tail piece for retaining the latchbolt assembly in operative position, and a center tube having its outerend received in and connected to said outer tube and provided with arollback intermediate its ends, and an inner knob assembly including aninner knob and an inner tube carrying an inner clamp plate and anescutcheon, said inner tube receiving therein and connected to the innerend of said center tube, and said inner clamp plate being connected tosaid outer clamp plate by attaching means insertable through said innerclamp plate and having adjustable engagement with said studs for drawingsaid clamp plates tightly against the opposite sides of the door andaccommodating doors of varying thickness.

2. A lock construction for a door or other closure, comprising a latchbolt assembly having a housing and a rearwardly projecting boltretractor of flexible metal including spaced legs in the housing whichare flared outwardly and rearwardly and then turned inwardly to providerelaatively wide shoulders at the exterior of said housing, an outerknob unit including an outer knob, an outer tube on which the knob ismounted, an outer clamp plate and escutcheon mounted on said tube withsaid clamp plate provided with attaching studs, and a center tube havingits outer end received in and connected to said outer tube, said centertube being cut away intermediate its ends at a point aligned with and onthe side opposite said latch bolt assembly to provide camming surfacesforming a rollback, said legs of the retractor extending around saidrollback with the shoulders adapted to engage the camming surfaces onthe side of the rollback away from said latch bolt, and an inner knobassembly including an inner knob and an inner tube carrying an innerclamp plate and an escutcheon, said inner tube receiving therein andconnected to the inner end of the center tube, and said inner clampplate being connected to said outer clamp plate by attaching meansinsertable through said inner clamp plate and having adjustableengagement with said studs for drawing said clamp plates tightly againstthe opposite sides of the door.

3. A lock construction for a door or other closure in which locking iseffected by a push button, comprising a latch bolt assembly, an outerknob assembly including an outer tube and knob mounted thereon, anintermediate tube having a rollback operatively connected to said latchbolt assembly with an end of the intermediate tube telescoped withinsaid outer tube, an inner knob assembly including an inner tube and aninner knob mounted thereon, said inner tube receiving therein andsecured to the inner end of the intermediate tube, an outer clamp plateand escutcheon on the outer tube and an inner clamp plate and escutcheonon the inner tube, said clamp plates being secured together and heldstationary on a door and mounting said inner, outer and intermediatetubes for rotation, and a push button-actuated locking means including aspring-biased locking bar projecting through said inner tube and intosaid intermediate tube, a locking clip pivotally mounted on said lockingbar and a pair of spaced stops on the interior surface of theintermediate tube one of which is engaged by said clip for locking thebar in 8 projected position, and a laterally extending projection on theinner end of the locking bar, said outer tube and one end of saidintermediate tube having'coinciding longitudinal slots receiving saidprojection so that the inner and intermediate tubes and the locking barrotate simultaneously in the retracted position of the locking bar, saidouter clamp plate having a slot normally aligned with the slot in theouter tube to receive the projection when the locking bar is in lockedposition to prevent rotation of the outer tube and knob and retractionof the latch bolt.

4. A lock construction as set forth in claim 3, in which a secondlateral projection is formed on said locking bar spaced from said firstprojection, and said intermediate tube has a longitudinal slot at theopposite end thereof receiving said second projection when the lockingbar is in unlocked position, said projection being free of said slotwhen said bar is in locked position.

5. A lock constructon as set forth in claim 4, in which saidintermediate tube has a circumferential slot therein communicating withsaid longitudinal slot and aligned with said first mentioned projectionon said locking bar in the locked position so that the intermediate tubemay be rotated relative to said locking bar and independently of theouter tube.

6. A lock construction as set forth in claim 5, in which the outer knoband tube are provided with a keyoperated locking means operativelyconnected with said intermediate tube to rotate said intermediate tuberelative to said locking bar in its locked position to release saidlocking bar from its locked position.

7. A lock construction for a door or other closure comprising a latchbolt assembly having a housing provided with a tail piece having apolygonal opening and a rearwardly projecting flexible bolt retractor,an outer knob assembly including an outer knob, an outer tube on whichthe knob is mounted having a longitudinal slot therein, a clamp plateand escutcheon mounted on said tube with said clamp plate provided withrearwardly projecting attaching studs one of which is of polygonal crosssection conformably received and projected through the polygonal openingof said tail piece for retaining the latch bolt assembly in operativeposition, said clamp plate having a slot therein normally aligned withthe slot in the outer tube, and a center tube having its outer endreceived in said outer tube and having a cut-out providing a rollbackintermediate its ends, said center tube having a longitudinal slot ateach side of the cut-out normally aligned with the slot in the outertube and a circumferential slot, an inner knob assembly including aninner knob and an inner tube carrying an inner clamp plate andescutcheon, said inner tube receivingtherein and connected to the innerend of the center tube, said inner clamp plate being connected to saidouter clamp plate by attaching means insertable through said inner clampplate and having adjustable engagement with said studs for drawing saidclamp plates tightly against the opposite sides of the door, and areciprocable locking bar extending from said inner knob through saidinner and center tubes, a push button in said inner knob actuating theinner end of said bar to manually reciprocate the locking bar from afirst position to a second position, and locking means retaining saidbar in its second position, said locking bar including a lateralprojection intermediate its ends which projects into the slot in thecenter tube adjacent the inner tube in said first position and is movedclear of the slot in said second position, and a relatively longerlateral projection adjacent the outer end of said bar extending into thealigned longitudinal slots in the outer and center tubes connecting theouter and center tubes for rotation in the first position and extendinginto the aligned slots in the outer tube and the outer clamp plate andthe circumferential slot in the center tube for retaining the outer tubeand knob against rotation in the second position.

8. A lock construction as set forth in claim 7 in which said lockingmeans for said bar includes a locking clip 9 pivotally mounted on saidlocking bar and spaced stop members on the interior surface of saidcenter tube, said locking clip adapted to engage one of the two stopmembers and to be released from the stop member for said second positionby rotation of the center tube relative to said locking bar and lockingclip.

9. A lock construction as set forth in claim 8, including spring-biasingmeans to urge said locking bar to its first position.

10. A lock construction as set forth in claim 9, in which the inner,outer and center tubes and the locking bar rotate simultaneously uponrotation of a knob when the locking bar is in its first position, andwhen said locking bar is in its second position said outer tube and knoband said locking bar are held against rotation while said inner tube andknob and said center tube are capable of rotation relative to said outertube and locking bar to release said locking clip and return saidlocking bar to said first position.

11. A lock construction as set forth in claim 10, including akey-operated lock in said outer knob operatively connected to saidcenter tube to rotate said tube relative to said locking bar to releasesaid bar from its second position and simultaneously permit the bolt tobe retracted.

12. A lock construction for a door or other closure comprising .a latchbolt assembly having a housing provided with a rearwardly projectingflexible bolt retractor, an outer knob assembly including an outer knob,an

outer tube on which the knob is mounted, a clamp plate and escutcheonmounted on said tube with said clamp plate provided with rearwardlyprojecting attaching studs, and a center tube having its outer endreceived in said outer tube and having a cut-out providing -a rollbackintermediate its ends, an inner knob assembly including an inner knoband an inner tube carrying an inner clamp plate and escutcheon, saidinner tube receiving therein and connected to the inner end of saidcenter tube, said inner clamp plate being connected to said outer clampplate by attaching means insertable through said inner clamp plate andhaving adjustable engagement with said studs for drawing said clampplates tightly against the opposite sides of the door, and reciprocablemeans operatively connecting said outer and center tubes forsimultaneous rotation in a first position and for retaining said outertube and knob against rotation but allowing rotation of the center tuberelative to the outer tube in a second position.

References Cited by the Examiner UNITED STATES PATENTS 62,908 3 /1867Upton 292169 1,456,041 5/ 1923 Schlage 292169 2,739,472 3/1956 North etal. 70-146 3,022,102 2/ 1962 Russell et a1 292169 3,042,437 7/ 1962Duvall 292169 K ALBERT H. KAMPE, Primary Examiner.

12. A LOCK CONSTRUCTION FOR A DOOR OR OTHER CLOSURE COMPRISING A LATCHBOLT ASSEMBLY HAVING A HOUSING PROVIDED WITH A REARWARDLY PROJECTINGFLEXIBLE BOLT RETRACTOR, AN OUTER KNOB ASSEMBLY INCLUDING AN OUTER KNOB,AN OUTER TUBE ON WHICH THE KNOB IS MOUNTED, A CLAMP PLATE AND ESCUTCHEONMOUNTED ON SAID TUBE WITH SAID CLAMP PLATE PROVIDED WITH REARWARDLYPROJECTING ATTACHING STUDS, AND A CENTER TUBE HAVING ITS OUTER ENDRECEIVED IN SAID OUTER TUBE AND HAVING A CUT-OUT PROVIDING A ROLLBACKINTERMEDIATE ITS ENDS, AN INNER KNOB ASSEMBLY INCLUDING AN INNER KNOBAND AN INNER TUBE CARRYING AN INNER CLAMP PLATE AND ESCUTCHEON, SAIDINNER TUBE RECEIVING THEREIN AND CONNECTED TO THE INNER END OF SAIDCENTER TUBE, SAID INNER CLAMP PLATE BEING CONNECTED TO SAID OUTER CLAMPPLATE BY ATTACHING MEANS INSERTABLE THROUGH SAID INNER CLAMP PLATE ANDHAVING ADJUSTABLE ENGAGEMENT WITH SAID STUDS FOR DRAWING SAID CLAMPPLATES TIGHTLY AGAINST THE OPPOSITE SIDES OF THE DOOR, AND RECIPROCABLEMEANS OPERATIVELY CONNECTING SAID OUTER AND CENTER TUBES FORSIMULTANEOUS ROTATION IN A FIRST POSITION AND FOR RETAINING SAID OUTERTUBE AND KNOB AGAINST ROTATION BUT ALLOWING ROTATION OF THE CENTER TUBERELATIVE TO THE OUTER TUBE IN A SECOND POSITION.